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(No Modell) R. Cv' PAR'VIN.

AXLB BOX. No. 288,85l. Patented Nov. 20. 1883.

N. PEIERS. Mmmm. wma-5mn, u. c.

' ful improvements in axles and axle-boxes; and

' drawings.

UNITED STATES PATENT OFFICE.

AXLE- BOX.

SPECIFICTION forming part of`Letters Patent No. 288,851, dated November 20, 18.83.

Application filed July To zZ/l whom, t may coacernf Be it known that I, ROBERT C. PARVIN, a citizen of the United States, residing at Mount Holly, in the countyvof Burlington and State of New Jersey, have invented certain new and useful Improvements in Axles and Axle-Boxes, of which the following is a specification, reference being had therein tothe accompanying My invent-ion relates to certain new and useit consists `in arranging a series of frictionrollers around the arm of an axle within the axle-box, which is formed with an inner enlargement, and providing said axle-box with a retaining collar and pin, and forming said rollers and axle in such a manner that longitudinal movement of the part-s is to a great extent obvia-ted.

The object of my invention is to reduce the friction in axle-bearings to the minimum, to reduce the amount of wear and grinding away of the axle and axle-box, so common in the q old formation of axle and box, and prevent to a great extent the sliding end motion when the axles are in use. I attain these objects by means of the peculiar construction and arrangement of the various parts of my device, which will be more fully pointed out and described in the speciiication and claims.

Reference being had to the drawings accompanying this application, and forming part of the same, Figure lis a perspective view of my invention, showing the axle and axle-box in place. Fig. 2 is a longitudinal sectional view, showing the inside of half the box and a p0rtion of the friction-rollers. Fig. 3 is a vertical sectional view taken through the rcenter of axle arm and box, showing position of frictionrollers and central bearings. Fig. 4t is a crosssection of axle-box, showing central enlargement. Fig. 5 is a detail view of the enlargement or central open band around axle-arm.

Similar letters refer to si milar parts throughout the drawings.

Referring to the drawings, A represents the axle-box, and B the axle. The axle-box is formed of metal, and of an r desired length vand diameter, suitable for use in any hub of a wheel used on vehicles, said. box being'con- 31` 1883. (No model.)

structed in the form of a hollow cylinder of equal diameter on the inside from end to end, except the center, which is enlarged or thickened to form an annular ring, j', having square shoulders, the purpose of which is to form bearings for friction-rollers, that are introduced endwise in said axle-box. rIhe outer surface of said axle-box is provided with longitudinal iins or ribs a, by which said box A is held in place within the hub of the wheel. The inner surface of said axle-box is formed of about the same diameter, except the center, which is raised or thickened to form a bearing, f, on which the rollers, in part, form a bearing.

The axle B, or axle-arm, I prefer to form of the same diameter from shoulder to linchpin or washer, except the central portion, which is surrounded with a collar, b', that acts partially as a bearing and partially as a stop to hold friction-rollers.

Friction-rollers g (usually nine in number) are formed of metal, and of the same length as the box A, the central portion of each roller being recessed to a sufficient depth to admit the annular enlargement fand the collar b, by which said friction-rollers are held in place against any end movement, the shoulders of said recesses g acting as end bearings for said friction-rollers, whereas their outer ends have bearings against the collar b and the washer c .in common with the ends of the box A. By this construction the bearings on the arm of the axle are equally divided, the weight in the vehicle is equally distributed along the arm of the axle, and less friction is encountered, and the wheel revolves on the bearing free and easy, whereby a greater load can be carried on the wagon than by the ordinary construction of axle and axle-box.

Axle-box B, as hereinbefore stated, may be formed in two half-sections, that, when united, form a hollow cylinder with equal internal diameter. One end may be formed closed, except a central perforation for the reception of the axle. The friction-rollers g are introduced into the axle-box B by first placing them parallel in position around the spring-band b', said band fitting inside the sh ou] d ered recesses The wheel g formed in said friction-rollers.

IOO

containing the axle-box B is placed in a hori- 1. A metallic axle-box with an inner cen- Zontal position, so that one end of box Arests l tral annular enlargement formed integrally on the upper face of the base of a cone, the with the box, and retained upon the axle by cone part projecting into said box, sufficient a collar, c, and linchpin, in combinationwith Space being left between the inner face of the a series of loose or non-j ournaled friction-roll box and the outer surface of the cone to reers extending nearly the entire length of the oeive the friction-rollers g, which are dropped box, and having central recesses, substantially in from the outer end of box I3. When all the as shown and specified. rolls g are in place, the ring b is sprung into 2. rIhe combination of the axle-box A, the the recesses g', and by expanding holds the internalannularcentralrib, f, and thefrictionrolls g against the inner face of box B, when rollers g, having recesses g', with the axle arm the cone is withdrawn and the axle inserted. l B, having central collar, b, the washer c, and An opening for oil-pipe b2 is made in box B, l the collar b, all arranged and operated subsaid pipe extending out through thehub of the stantially as shown. wheel. In testimony whereof I affix my signature in I am. aware of the Patent No. 218,939, dated presence of two witnesses. August 26, 1879, for axle-boxes," its construction and arrangement of the various parts, andI therefore do not, broadly7 claim the same. Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

ROBERT o. rARvIN.

Vitnesses:

.TAMEs LirPINoo'r'r, Jr., HENRY W. JoBns. 

